initial commit

This commit is contained in:
ramil 2020-12-04 20:00:13 +03:00
commit c3eb8acc07
10 changed files with 739 additions and 0 deletions

11
.env.example Normal file
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SERVER_PORT=3000
SERVER_HOST=127.0.0.1
ETHERSCAN_API_KEY=
# DB Statediff
STATEDIFF_PG_HOST=
STATEDIFF_PG_PORT=
STATEDIFF_PG_USER=
STATEDIFF_PG_PASSWORD=
STATEDIFF_PG_DATABASE=

2
.gitignore vendored Normal file
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node_modules
.env

20
Dockerfile Normal file
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FROM node:10.15.2-alpine
# Create app directory
WORKDIR /app
RUN apk add --no-cache \
make g++ git ca-certificates
#RUN npm config set unsafe-perm true && npm install -g typescript ts-node
COPY package*.json ./
RUN yarn
COPY . .
#RUN npm run build
EXPOSE 3000

15
package.json Normal file
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{
"name": "eth-state-metrics",
"version": "1.0.0",
"description": "NodeJS Service to pull last block from etherscan and DB and provide Prometheus metrics",
"main": "index.js",
"license": "MIT",
"private": true,
"dependencies": {
"axios": "^0.21.0",
"dotenv": "^8.2.0",
"express": "^4.17.1",
"pg": "^8.5.1",
"prom-client": "^12.0.0"
}
}

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src/db.js Normal file
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const { Client } = require('pg');
class DB {
constructor(type, user, password, database, host, port) {
this.type = type;
this.client = new Client({
user,
host,
database,
password,
port,
});
this.connecting = false;
}
async getBlockNumber() {
if (!this.connecting) {
await this.connect();
this.connecting = true;
}
return this.client.query('SELECT block_number FROM eth.header_cids ORDER BY block_number DESC LIMIT 1')
.then((res) => {
if (res.rows.length) {
return {
type: this.type,
blockNumber: parseInt(res.rows[0].block_number, 10),
}
}
return null;
});
}
connect() {
return this.client.connect();
}
}
module.exports = DB;

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src/error.js Normal file
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class AppError extends Error {
constructor(type, message) {
super(`Error ${type}: ${message}`);
this.data = {
type,
message,
}
}
}
module.exports = AppError;

27
src/etherscan.js Normal file
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const axios = require('axios');
const AppError = require('./error');
const etherscanClient = axios.create({
baseURL: 'https://api.etherscan.io',
});
const getBlockNumber = () => {
return etherscanClient.get(`/api?module=proxy&action=eth_blockNumber&apikey=${process.env.ETHERSCAN_API_KEY}`)
.then((response) => {
const data = response.data;
// console.log(data);
if (data.status === '0') {
throw new AppError('etherscan', data.result);
}
return {
type: 'etherscan',
blockNumber: parseInt(data.result, 16),
}
})
}
module.exports = {getBlockNumber};

72
src/index.js Normal file
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require('dotenv').config()
const express = require('express')
const etherscan = require('./etherscan');
const AppError = require('./error');
const prom = require('./prometheus');
const DB = require('./db');
const startServer = () => {
const server = express();
server.get('/metrics', async (req, res) => {
try {
res.set('Content-Type', prom.register.contentType)
res.end(await prom.register.metrics())
} catch (ex) {
res.status(500).end(ex)
}
});
server.listen(process.env.SERVER_PORT);
}
const main = async () => {
startServer();
const statediffUser = process.env.STATEDIFF_PG_USER;
const statediffPassword = process.env.STATEDIFF_PG_PASSWORD;
const statediffDB = process.env.STATEDIFF_PG_DATABASE;
const statediffHost = process.env.STATEDIFF_PG_HOST;
const statediffPort = process.env.STATEDIFF_PG_PORT;
const dbStateDiff = new DB('statediff', statediffUser, statediffPassword, statediffDB, statediffHost, statediffPort)
const dbStateDiffBlockNumber = dbStateDiff.getBlockNumber();
// Etherscan
const etherscanBlock = etherscan.getBlockNumber();
const results = await Promise.allSettled([
etherscanBlock,
dbStateDiffBlockNumber,
])
// console.log(results);
for (const result of results) {
// console.log(result);
if (result.status === 'rejected') {
if (result.reason instanceof AppError) {
const errorData = result.reason.data;
console.log(errorData.type, errorData.message);
} else {
console.error(result.reason);
}
} else if (result.status === 'fulfilled') {
const value = result.value;
switch (value.type) {
case 'etherscan':
prom.etherscanGauge.set(value.blockNumber);
break;
case 'statediff':
prom.statediffDBGauge.set(value.blockNumber);
break;
}
}
}
}
main().catch((e) => console.error(e));

13
src/prometheus.js Normal file
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const client = require('prom-client');
const collectDefaultMetrics = client.collectDefaultMetrics;
const Registry = client.Registry;
const register = new Registry();
const prefix = 'eth_state_metrics_';
collectDefaultMetrics({ register });
const etherscanGauge = new client.Gauge({ name: `${prefix}etherscan`, help: 'Etherscan Block Number', registers: [register]});
const statediffDBGauge = new client.Gauge({ name: `${prefix}statediff_db`, help: 'Statediff DB Block Number', registers: [register]});
module.exports = {etherscanGauge, statediffDBGauge, register};

525
yarn.lock Normal file
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path-to-regexp@0.1.7:
version "0.1.7"
resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
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pg-connection-string@^2.4.0:
version "2.4.0"
resolved "https://registry.yarnpkg.com/pg-connection-string/-/pg-connection-string-2.4.0.tgz#c979922eb47832999a204da5dbe1ebf2341b6a10"
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pg-int8@1.0.1:
version "1.0.1"
resolved "https://registry.yarnpkg.com/pg-int8/-/pg-int8-1.0.1.tgz#943bd463bf5b71b4170115f80f8efc9a0c0eb78c"
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pg-pool@^3.2.2:
version "3.2.2"
resolved "https://registry.yarnpkg.com/pg-pool/-/pg-pool-3.2.2.tgz#a560e433443ed4ad946b84d774b3f22452694dff"
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pg-protocol@^1.4.0:
version "1.4.0"
resolved "https://registry.yarnpkg.com/pg-protocol/-/pg-protocol-1.4.0.tgz#43a71a92f6fe3ac559952555aa3335c8cb4908be"
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pg-types@^2.1.0:
version "2.2.0"
resolved "https://registry.yarnpkg.com/pg-types/-/pg-types-2.2.0.tgz#2d0250d636454f7cfa3b6ae0382fdfa8063254a3"
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dependencies:
pg-int8 "1.0.1"
postgres-array "~2.0.0"
postgres-bytea "~1.0.0"
postgres-date "~1.0.4"
postgres-interval "^1.1.0"
pg@^8.5.1:
version "8.5.1"
resolved "https://registry.yarnpkg.com/pg/-/pg-8.5.1.tgz#34dcb15f6db4a29c702bf5031ef2e1e25a06a120"
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dependencies:
buffer-writer "2.0.0"
packet-reader "1.0.0"
pg-connection-string "^2.4.0"
pg-pool "^3.2.2"
pg-protocol "^1.4.0"
pg-types "^2.1.0"
pgpass "1.x"
pgpass@1.x:
version "1.0.4"
resolved "https://registry.yarnpkg.com/pgpass/-/pgpass-1.0.4.tgz#85eb93a83800b20f8057a2b029bf05abaf94ea9c"
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dependencies:
split2 "^3.1.1"
postgres-array@~2.0.0:
version "2.0.0"
resolved "https://registry.yarnpkg.com/postgres-array/-/postgres-array-2.0.0.tgz#48f8fce054fbc69671999329b8834b772652d82e"
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postgres-bytea@~1.0.0:
version "1.0.0"
resolved "https://registry.yarnpkg.com/postgres-bytea/-/postgres-bytea-1.0.0.tgz#027b533c0aa890e26d172d47cf9ccecc521acd35"
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postgres-date@~1.0.4:
version "1.0.7"
resolved "https://registry.yarnpkg.com/postgres-date/-/postgres-date-1.0.7.tgz#51bc086006005e5061c591cee727f2531bf641a8"
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postgres-interval@^1.1.0:
version "1.2.0"
resolved "https://registry.yarnpkg.com/postgres-interval/-/postgres-interval-1.2.0.tgz#b460c82cb1587507788819a06aa0fffdb3544695"
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dependencies:
xtend "^4.0.0"
prom-client@^12.0.0:
version "12.0.0"
resolved "https://registry.yarnpkg.com/prom-client/-/prom-client-12.0.0.tgz#9689379b19bd3f6ab88a9866124db9da3d76c6ed"
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dependencies:
tdigest "^0.1.1"
proxy-addr@~2.0.5:
version "2.0.6"
resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.6.tgz#fdc2336505447d3f2f2c638ed272caf614bbb2bf"
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dependencies:
forwarded "~0.1.2"
ipaddr.js "1.9.1"
qs@6.7.0:
version "6.7.0"
resolved "https://registry.yarnpkg.com/qs/-/qs-6.7.0.tgz#41dc1a015e3d581f1621776be31afb2876a9b1bc"
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range-parser@~1.2.1:
version "1.2.1"
resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
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raw-body@2.4.0:
version "2.4.0"
resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.4.0.tgz#a1ce6fb9c9bc356ca52e89256ab59059e13d0332"
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dependencies:
bytes "3.1.0"
http-errors "1.7.2"
iconv-lite "0.4.24"
unpipe "1.0.0"
readable-stream@^3.0.0:
version "3.6.0"
resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
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dependencies:
inherits "^2.0.3"
string_decoder "^1.1.1"
util-deprecate "^1.0.1"
safe-buffer@5.1.2:
version "5.1.2"
resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
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safe-buffer@~5.2.0:
version "5.2.1"
resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
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"safer-buffer@>= 2.1.2 < 3":
version "2.1.2"
resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
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send@0.17.1:
version "0.17.1"
resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
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dependencies:
debug "2.6.9"
depd "~1.1.2"
destroy "~1.0.4"
encodeurl "~1.0.2"
escape-html "~1.0.3"
etag "~1.8.1"
fresh "0.5.2"
http-errors "~1.7.2"
mime "1.6.0"
ms "2.1.1"
on-finished "~2.3.0"
range-parser "~1.2.1"
statuses "~1.5.0"
serve-static@1.14.1:
version "1.14.1"
resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.14.1.tgz#666e636dc4f010f7ef29970a88a674320898b2f9"
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dependencies:
encodeurl "~1.0.2"
escape-html "~1.0.3"
parseurl "~1.3.3"
send "0.17.1"
setprototypeof@1.1.1:
version "1.1.1"
resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.1.tgz#7e95acb24aa92f5885e0abef5ba131330d4ae683"
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split2@^3.1.1:
version "3.2.2"
resolved "https://registry.yarnpkg.com/split2/-/split2-3.2.2.tgz#bf2cf2a37d838312c249c89206fd7a17dd12365f"
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dependencies:
readable-stream "^3.0.0"
"statuses@>= 1.5.0 < 2", statuses@~1.5.0:
version "1.5.0"
resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
string_decoder@^1.1.1:
version "1.3.0"
resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.3.0.tgz#42f114594a46cf1a8e30b0a84f56c78c3edac21e"
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dependencies:
safe-buffer "~5.2.0"
tdigest@^0.1.1:
version "0.1.1"
resolved "https://registry.yarnpkg.com/tdigest/-/tdigest-0.1.1.tgz#2e3cb2c39ea449e55d1e6cd91117accca4588021"
integrity sha1-Ljyyw56kSeVdHmzZEReszKRYgCE=
dependencies:
bintrees "1.0.1"
toidentifier@1.0.0:
version "1.0.0"
resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
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type-is@~1.6.17, type-is@~1.6.18:
version "1.6.18"
resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
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dependencies:
media-typer "0.3.0"
mime-types "~2.1.24"
unpipe@1.0.0, unpipe@~1.0.0:
version "1.0.0"
resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
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util-deprecate@^1.0.1:
version "1.0.2"
resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
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utils-merge@1.0.1:
version "1.0.1"
resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
vary@~1.1.2:
version "1.1.2"
resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
xtend@^4.0.0:
version "4.0.2"
resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
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